Tips for filing a 1099 while also being a full time W2 employee?

[Brandon Chidester]

I appreciate anyone willing to share some tax advice! I am currently a full time W2 Employee. I also do real estate transactions on the side as a 1099 Real Estate agent. I have to believe there is a great number of individuals in the BP community that do something similar. 

I would like to limit the amount I owe in 1099 taxes by writing off Real Estate training courses I've attended, my mileage, business cards, etc. I have been told that filing a 1099 form and writing off against the taxes owed can be difficult when you also have W2 income. 

Can anyone advise on how they have done this in years past? Or if there are some tips I should keep in mind?

Thank you!

Brandon